MAYBE
(ignored inputs)COMMENT doi:10.4230/LIPIcs.FSCD.2016.33 [36] Example 1 submitted by: Takahito Aoto
Rewrite Rules:
   [ +(0,0) -> 0,
     +(s(?x),?y) -> s(+(?x,?y)),
     +(?x,s(?y)) -> s(+(?y,?x)) ]
Apply Direct Methods...
Inner CPs:
   [  ]
Outer CPs:
   [ s(+(?x,s(?y_1))) = s(+(?y_1,s(?x))) ]
Linear
(inner) Parallel CPs: (not computed)
unknown Toyama (Parallel CPs)
Direct Methods: Can't judge

Combined result: Can't judge
571.trs: Failure(unknown CR)
(0 msec.)